用库尔特计数器测得的直径称为（）.
A．定方向径
B．等价径
C．体积等价径
D．有效径
E．筛分径
参考答案：C
由四舍五入法得到的近似数0.0200的有效数字是[ ]
A.1个
B.2个
C.3个
D.4个
—Do you think pink looks nice ____ me?
—Of course. You look so nice ___ pink.
A．on, in
B．in, in
C．on, on
D．in, on
